How to swap out a job which is running...
Helmut Springer
: I need to use my machine every now and then,but I do not want
: to kill someone's job. What I want to do is that I will force the big job
: to wait, sleep or be swapped out when I need the machine. Afterwards
: I'll put it back to run.
as root you can 'renice' a job, which means to give a lower priority
so that your machine hast time enough for you...
see 'man renice'
regards
delta
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Timothy J. Hunt
Zhu Decai <zh...@spot.Colorado.EDU> wrote:
>Hello there,
>
> I need to use my machine every now and then,but I do not want
>to kill someone's job. What I want to do is that I will force the big job
>to wait, sleep or be swapped out when I need the machine. Afterwards
>I'll put it back to run.
>
Yes. use renice.
man renice
for how :o)
Timothy
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Timothy Hunt, System Admin Support Engineer, Unipalm PIPEX
216 The Science Park, Cambridge, CB4 4WA UK. +44(0)1223 250121/2 (Fax/Voice)
[Disclaimer: I said the above, not Unipalm PIPEX]
And my name is Timothy *not* Tim! *sigh*
Zhu Decai
I have a Sparc station with SunOS, Someone is running a big
job on my machine. It almost takes all onboard memory, I can not
do anything with the machine.
I need to use my machine every now and then,but I do not want
to kill someone's job. What I want to do is that I will force the big job
to wait, sleep or be swapped out when I need the machine. Afterwards
I'll put it back to run.
Do anyone know if superuser can do it? and How?
Decai
Ross Alexander
>In article <47dl2g$k...@peabody.colorado.edu>,
>Zhu Decai <zh...@spot.Colorado.EDU> wrote:
>>Hello there,
>>
>> I need to use my machine every now and then,but I do not want
>>to kill someone's job. What I want to do is that I will force the big job
>>to wait, sleep or be swapped out when I need the machine. Afterwards
>>I'll put it back to run.
>>
>> Do anyone know if superuser can do it? and How?
>Yes. use renice.
>man renice
>for how :o)
On BSD derived unices, kill -STOP and kill -CONT may be a better way.
It's guaranteed to stop the job, and so you don't get swap-thrash
etc etc.
regards,
Ross
--
Ross Alexander, ve6pdq -- (403) 675 6311 -- r...@cs.athabascau.ca
Kurtis D. Rader
>In article <47dl2g$k...@peabody.colorado.edu>,
>Zhu Decai <zh...@spot.Colorado.EDU> wrote:
>>
>> I need to use my machine every now and then,but I do not want
>>to kill someone's job. What I want to do is that I will force the big job
>>to wait, sleep or be swapped out when I need the machine. Afterwards
>>I'll put it back to run.
>Yes. use renice.
>Timothy
Not every system has renice(1). Besides which, it allows you
to only slightly influence the scheduling of processes. It does
not allow you to completely stop a process. Most Unix'es provide
the STOP and CONT signals. Doing "kill -STOP <pid>" will suspend
the process. Later do a "kill -CONT <pid>" to put it back on the
scheduler's queue.
--
Kurtis D. Rader, Sr. Technical Consultant voice: 503/578-3714
Sequent Computer Systems fax: 503/578-5453
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Beaverton, OR 97006-6063 Internet: kra...@sequent.com
Timothy J. Hunt
Kurtis D. Rader <kra...@sequent.com> wrote:
>timo...@pipex.net (Timothy J. Hunt) writes:
>
>
>>Yes. use renice.
>>Timothy
>
>Not every system has renice(1). Besides which, it allows you
But in his posting he said he was using SunOS, which does :o)
and the advantage of using renice is that the user can still see (assumming
his program outputs something to a file) that it is working, whereas if the
process has been SIGSTOPped he might think it has a bug in it, kill it, and
start again.